Sound attenuating volume control dampers in polyurethane foam

• For air regulation and acoustic attenuation in ventilation and airconditioning systems
• To be inserted easily into round ducts with low sound generation even at large pressure drops
• Pressure and airflow are easily adjustable by varying the number of open holes of the damper
• Multiple dampers can be used to obtain higher acoustic attenuation

• Damper mainly made out of flexible polyurethane foam with very good damping abilities and flameresistance tested according FMVSS-302, the fabric flammability standard, wich is also the standard used in e.g. the automotive industry. Fire resistance class B (Equivalent to M1)
• Cut-out holes with parts that can easily be taken out to adjust air volumes
• Anti-bacterial anti-fungus foam mousse
• Rot-free

• Black coverage at one end and mixed-colored polyurethane foam 

• To be inserted in circular ducts of Ø100, Ø125, Ø160 and Ø200
• Dampers for ducts in Ø80, Ø250 and Ø315 available upon request
• To be mounted at at least 50-350 mm distance A between the duct opening and first SAVD damper when used in air supply
• To be mounted at at least 0-50 mm distance A between the duct opening and the first SAVD damper when used for exhaust of air
• To be mounted at a minimum distance B in between 2 dampers at at least 250mm in air supply and 150mm in air exhaust when multiple dampers are mounted